import unittest
from wc import cou_char, cou_w, cou_sen
class Test_basic_function(unittest.TestCase):
    def test_cou_char(self):
        result = cou_char("test.txt")
        self.assertEqual(result, 134)

    def test_cou_w(self):
        result = cou_w("test.txt")
        self.assertEqual(result, 42)

    def test_cou_sen(self):
        result = cou_sen("test.txt")
        self.assertEqual(result, 4)
if __name__ == '__main__':
    unittest.main()